The 27 Hz AMT map (Fig. 5a) defines a resistivity low near the hot spring with minimum values of 2.5 ohm-m; the deeper probing 7.5 Hz map (Fig. 5b) defines a similar low with minimum values of 1.6 ohm-m. Both maps show a second low to the south apparently associated with the low-density Cenozoic sediments. Three telluric profiles across the KGRA also define a low of about the same extent as that indicated on the 7.5 Hz AMT map (Fig. 6b). The resistivity data suggest a reservoir of limited horizontal extent.